Ergodyne CORE Performance Work Wear 6435 Long Sleeve Shirt, Gray, 2X-Large Polyester 92%/Spandex 8% Imported Base Layer/Thermal/Ripped Fit: Mock T and medium weight stretch fabric for warm comfort. Medium weight wicking fabrics for warmth Anti-stink treatments help workers remain unscented Soil release treatments make cleaning easy 50+ UPF for protection against harmful UV